Convert between binary, octal, decimal and hexadecimal number systems
Format Converter
About This Tool
Base Converter is an online tool that lets you instantly convert numbers between binary, octal, decimal, and hexadecimal systems. Type in any base and the other three update in real time, with per-field copy buttons and an auto-clear option. All computation runs locally in your browser, so your data never leaves your device.
Key Features
- Real-time conversion between binary, octal, decimal, and hexadecimal
- Four independent input fields with Base badge labels (Base 2, 8, 10, 16)
- Auto Clear option to reset other fields when input is erased
- One-click copy button for each base with toast confirmation
- Input highlight animation showing which fields just updated
- Prefix support for 0x, 0o, and 0b notation from source code
Use Cases
- Debug and verify number values when working with low-level programming
- Convert memory addresses and color codes between hex and decimal
- Learn and practice number base conversion for computer science courses
- Translate binary or octal values from embedded systems logs into readable decimal
- Quickly check hex values for CSS colors, Unicode code points, or file permissions
binary
octal
decimal
hexadecimal
Frequently Asked Questions
What number bases does the Base Converter support?
The Base Converter supports four number bases: binary (Base 2), octal (Base 8), decimal (Base 10), and hexadecimal (Base 16). You can type in any base and the other three update instantly in real time.
What does the Auto Clear option do?
When Auto Clear is enabled, all other base fields are cleared automatically when you erase the input in the active field. This keeps the interface clean when starting a new conversion.
Does the tool support prefix notation like 0x or 0b?
Yes. The parser automatically strips common prefixes such as 0x for hexadecimal, 0o for octal, and 0b for binary, so you can paste values directly from source code without manual cleanup.
Is my data safe when using the Base Converter?
Absolutely. All processing happens locally in your browser. No data is uploaded to any server, ensuring your information remains completely private and secure.
Can I use the Base Converter on my phone?
Yes, the Base Converter is fully responsive and works on all devices including smartphones, tablets, and desktop computers.